216666737374 has 16 divisors (see below), whose sum is σ = 337281178320. Its totient is φ = 104263548480.

The previous prime is 216666737369. The next prime is 216666737387. The reversal of 216666737374 is 473737666612.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5949312 + ... + 5985619.

It is an arithmetic number, because the mean of its divisors is an integer number (21080073645).

Almost surely, 2^216666737374 is an apocalyptic number.

216666737374 is a deficient number, since it is larger than the sum of its proper divisors (120614440946).

216666737374 is a wasteful number, since it uses less digits than its factorization.

216666737374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11935275.

The product of its digits is 32006016, while the sum is 58.

The spelling of 216666737374 in words is "two hundred sixteen billion, six hundred sixty-six million, seven hundred thirty-seven thousand, three hundred seventy-four".